SHIMS 3.0: Highly efficient single-haplotype iterative mapping and sequencing using ultra-long nanopore reads

The reference sequence of structurally complex regions can only be obtained through a highly accurate clone-based approach that we call Single-Haplotype Iterative Mapping and Sequencing (SHIMS). In recent years, improvements to SHIMS have reduced the cost and time required by two orders of magnitude...

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Main Authors: Daniel W. Bellott, Ting-Jan Cho, Emily K. Jackson, Helen Skaletsky, Jennifer F. Hughes, David C. Page
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2022-01-01
Series:PLoS ONE
Online Access:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9197060/?tool=EBI
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author Daniel W. Bellott
Ting-Jan Cho
Emily K. Jackson
Helen Skaletsky
Jennifer F. Hughes
David C. Page
author_facet Daniel W. Bellott
Ting-Jan Cho
Emily K. Jackson
Helen Skaletsky
Jennifer F. Hughes
David C. Page
author_sort Daniel W. Bellott
collection DOAJ
description The reference sequence of structurally complex regions can only be obtained through a highly accurate clone-based approach that we call Single-Haplotype Iterative Mapping and Sequencing (SHIMS). In recent years, improvements to SHIMS have reduced the cost and time required by two orders of magnitude, but internally repetitive clones still require extensive manual effort to transform draft assemblies into reference-quality finished sequences. Here we describe SHIMS 3.0, using ultra-long nanopore reads to augment the Illumina data from SHIMS 2.0 assemblies and resolve internally repetitive structures. This greatly minimizes the need for manual finishing of Illumina-based draft assemblies, allowing a small team with no prior finishing experience to sequence challenging targets with high accuracy. This protocol proceeds from clone-picking to finished assemblies in 2 weeks for about $80 (USD) per clone. We recently used this protocol to produce reference sequence of structurally complex palindromes on chimpanzee and rhesus macaque X chromosomes. Our protocol provides access to structurally complex regions that would otherwise be inaccessible from whole-genome shotgun data or require an impractical amount of manual effort to generate an accurate assembly.
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spelling doaj.art-c160ce9fec7d463e86ac164abbb69b562022-12-22T03:29:02ZengPublic Library of Science (PLoS)PLoS ONE1932-62032022-01-01176SHIMS 3.0: Highly efficient single-haplotype iterative mapping and sequencing using ultra-long nanopore readsDaniel W. BellottTing-Jan ChoEmily K. JacksonHelen SkaletskyJennifer F. HughesDavid C. PageThe reference sequence of structurally complex regions can only be obtained through a highly accurate clone-based approach that we call Single-Haplotype Iterative Mapping and Sequencing (SHIMS). In recent years, improvements to SHIMS have reduced the cost and time required by two orders of magnitude, but internally repetitive clones still require extensive manual effort to transform draft assemblies into reference-quality finished sequences. Here we describe SHIMS 3.0, using ultra-long nanopore reads to augment the Illumina data from SHIMS 2.0 assemblies and resolve internally repetitive structures. This greatly minimizes the need for manual finishing of Illumina-based draft assemblies, allowing a small team with no prior finishing experience to sequence challenging targets with high accuracy. This protocol proceeds from clone-picking to finished assemblies in 2 weeks for about $80 (USD) per clone. We recently used this protocol to produce reference sequence of structurally complex palindromes on chimpanzee and rhesus macaque X chromosomes. Our protocol provides access to structurally complex regions that would otherwise be inaccessible from whole-genome shotgun data or require an impractical amount of manual effort to generate an accurate assembly.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9197060/?tool=EBI
spellingShingle Daniel W. Bellott
Ting-Jan Cho
Emily K. Jackson
Helen Skaletsky
Jennifer F. Hughes
David C. Page
SHIMS 3.0: Highly efficient single-haplotype iterative mapping and sequencing using ultra-long nanopore reads
PLoS ONE
title SHIMS 3.0: Highly efficient single-haplotype iterative mapping and sequencing using ultra-long nanopore reads
title_full SHIMS 3.0: Highly efficient single-haplotype iterative mapping and sequencing using ultra-long nanopore reads
title_fullStr SHIMS 3.0: Highly efficient single-haplotype iterative mapping and sequencing using ultra-long nanopore reads
title_full_unstemmed SHIMS 3.0: Highly efficient single-haplotype iterative mapping and sequencing using ultra-long nanopore reads
title_short SHIMS 3.0: Highly efficient single-haplotype iterative mapping and sequencing using ultra-long nanopore reads
title_sort shims 3 0 highly efficient single haplotype iterative mapping and sequencing using ultra long nanopore reads
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9197060/?tool=EBI
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